Lead testing/remedation for multifamily

[Petr Stuchlik]

Hi all.  I'm looking to buy (put offer down) my first multifamily (a duplex) in central MA in next few days. Owner claims that there was a lead inspection done about 8 years ago. However, he cannot find the report he received and says that it should not matter since the report expires in two years anyways. Does the lead inspection report expire after certain time period? He says that he tested one out of two units and lead was found in doors, door frames, windows, window frames and window sills. He also changed the windows for better ones. Is that going to flag the property as not properly deleded? I'm definitely planning to have a lead inspection done in the inspection period, but want to know up front if the windows change might raise some red flags.